我安装系统出现问题，请求帮助 [复制链接]

当我运行http://localhost/install/index.aspx时出现
The web application you are attempting to access on this web server is currently unavailable.  Please hit the "Refresh" button in your web browser to retry your request.

Administrator Note: An error message detailing the cause of this specific request failure can be found in the application event log of the web server. Please review this log entry to discover what caused this error to occur.
如何解决啊？